SCHUNK SRU-plus20-60 User instructions

Translation of Original Operating Manual
Assembly and Operating Manual
SRU-plus20 - 60
Pneumatic swivel unit

Imprint
2 11.00 | SRU-plus 20 - 60 | Assembly and Operating Manual | en | 389443
Imprint
Copyright:
This manual is protected by copyright. The author is SCHUNK GmbH & Co. KG. All rights
reserved.
Technical changes:
We reserve the right to make alterations for the purpose of technical improvement.
Document number: 389443
Version: 11.00|24/01/2022|en
Dear Customer,
thank you for trusting our products and our family-owned company, the leading
technology supplier of robots and production machines.
Our team is always available to answer any questions on this product and other solutions.
Ask us questions and challenge us. We will find a solution!
Best regards,
Your SCHUNK team
Customer Management
Tel. [phone]
Fax [phone]
[email protected]
Please read the operating manual in full and keep it close to the product.

Table of Contents
Table of Contents
1 General.................................................................................................................... 6
1.1 About this manual ................................................................................................ 6
1.1.1 Presentation of Warning Labels ...............................................................6
1.1.2 Applicable documents ..............................................................................7
1.1.3 Sizes ..........................................................................................................7
1.1.4 Variants.....................................................................................................7
1.2 Warranty .............................................................................................................. 7
1.3 Scope of delivery .................................................................................................. 8
1.3.1 Accessories pack.......................................................................................8
1.4 Accessories ........................................................................................................... 9
1.4.1 Seal kit ......................................................................................................9
2 Basic safety notes ..................................................................................................10
2.1 Intended use....................................................................................................... 10
2.2 Not intended use................................................................................................ 10
2.3 Constructional changes ...................................................................................... 10
2.4 Spare parts ......................................................................................................... 10
2.5 Ambient conditions and operating conditions ................................................... 10
2.6 Personnel qualification....................................................................................... 11
2.7 Personal protective equipment.......................................................................... 12
2.8 Notes on safe operation ..................................................................................... 12
2.9 Transport ............................................................................................................ 13
2.10 Malfunctions....................................................................................................... 13
2.11 Disposal .............................................................................................................. 13
2.12 Fundamental dangers......................................................................................... 14
2.12.1 Protection during handling and assembly ..............................................14
2.12.2 Protection during commissioning and operation ...................................15
2.12.3 Protection against dangerous movements.............................................15
2.12.4 Protection against electric shock............................................................16
2.13 Notes on particular risks..................................................................................... 17
3 Technical data.........................................................................................................19
3.1 Type key.............................................................................................................. 19
3.2 Basic data ........................................................................................................... 20
4 Design and description............................................................................................21
4.1 Design ................................................................................................................. 21
4.1.1 Variant with electrical feed-through (EDF).............................................22
4.2 Description ......................................................................................................... 23
5 Assembly ................................................................................................................24
5.1 Assembling and connecting................................................................................ 24
5.2 Connections........................................................................................................ 26
5.2.1 Mechanical connection...........................................................................26
5.2.2 Pneumatic connection............................................................................31
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Table of Contents
5.2.3 Electrical connection ..............................................................................33
5.3 Mounting separating sleeve ............................................................................... 35
5.4 Settings............................................................................................................... 36
5.4.1 Adjust swivel angle .................................................................................38
5.4.2 Adjust swiveling speed ...........................................................................40
5.4.3 Adjust absorber stroke ...........................................................................41
5.4.4 Set center position..................................................................................43
5.4.5 Set locked center position ......................................................................44
5.5 Installing the sensors.......................................................................................... 45
5.5.1 Overview of sensors ...............................................................................45
5.5.2 Mounting MMS 22 magnetic switch.......................................................46
5.5.3 Mounting MMS 22-PI1 magnetic switch ................................................48
5.5.4 Mounting inductive proximity switch IN 80 ...........................................50
6 Start-up ..................................................................................................................52
6.1 Setting ranges of the variants............................................................................. 52
6.2 Base unit............................................................................................................. 53
6.3 Center position ................................................................................................... 53
6.4 Locked center position ....................................................................................... 55
6.5 Locked center position with separate piston chambers..................................... 57
7 Troubleshooting .....................................................................................................59
7.1 Product does not move smoothly to the end positions ..................................... 59
7.2 Product does not travel through the rotating angle ..........................................59
7.3 Product rotates jerkily ........................................................................................ 59
7.4 Product does not move ...................................................................................... 60
7.5 Torque is diminishing ......................................................................................... 60
8 Maintenance ..........................................................................................................61
8.1 Notes .................................................................................................................. 61
8.2 Maintenance interval ......................................................................................... 61
8.3 Lubricants/Lubrication points (basic lubrication) ...............................................62
8.4 Inspect and set shock absorbers ........................................................................ 63
8.4.1 Inspect shock absorbers .........................................................................63
8.4.2 Set shock absorber overhang .................................................................63
8.4.3 Shock absorber types and overlap .........................................................63
8.5 Servicing shock absorber .................................................................................... 66
8.5.1 Servicing shock absorbers (absorber variant -W) ...................................66
8.5.2 Servicing shock absorbers (absorber variant -S).....................................67
8.6 Replace shock absorber...................................................................................... 68
8.6.1 Changing shock absorbers (base unit) .................................................... 68
8.6.2 Replacing external shock absorber (locked center position) .................. 69
8.6.3 Replace internal shock absorber (locked center position)......................70
8.7 Disassembly and assembly ................................................................................. 71
8.7.1 Dismantling and assembling rotary actuator (base unit) ....................... 71
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Table of Contents
8.7.2 Dismantle and assemble rotary actuator (center position/locked center
position) .................................................................................................. 72
8.7.3 Dismantling and assembling rotary actuator (fluid feed-through)....... 73
8.7.4 Dismantling and assembling rotary actuator (EDF) .................................74
8.8 Assembly drawings ............................................................................................. 75
8.8.1 Overview of the components ................................................................. 75
8.8.2 Overview of the components (EDF)........................................................ 79
9 Translation of original declaration of incorporation ................................................85
9.1 Annex to Declaration of Incorporation............................................................... 86
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General
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1 General
1.1 About this manual
This manual contains important information for a safe and
appropriate use of the product.
This manual is an integral part of the product and must be kept
accessible for the personnel at all times.
Before starting work, the personnel must have read and
understood this operating manual. Prerequisite for safe working is
the observance of all safety instructions in this manual.
Illustrations in this manual are provided for basic understanding
and may differ from the actual product design.
In addition to these instructions, the documents listed
under }1.1.2 [/7] are applicable.
1.1.1 Presentation of Warning Labels
To make risks clear, the following signal words and symbols are
used for safety notes.
DANGER
Danger for persons!
Non-observance will inevitably cause irreversible injury or death.
WARNING
Dangers for persons!
Non-observance can lead to irreversible injury and even death.
CAUTION
Dangers for persons!
Non-observance can cause minor injuries.
CAUTION
Material damage!
Information about avoiding material damage.

General
1.1.2 Applicable documents
• General terms of business *
• Catalog data sheet of the purchased product *
The documents labeled with an asterisk (*) can be downloaded
from schunk.com.
1.1.3 Sizes
This operating manual applies to the following sizes:
• SRU-plus 20
• SRU-plus 25
• SRU-plus 30
• SRU-plus 35
• SRU-plus 40
• SRU-plus 50
• SRU-plus 60
1.1.4 Variants
This operating manual applies to the following variations:
• SRU-plus
• SRU-plus rotating angle 90°
• SRU-plus rotating angle 180°
• SRU-plus end position adjustability 3°
• SRU-plus end position adjustability 90°
• SRU-plus with fluid feed-through
• SRU-plus with pneumatic center position (M)
• SRU-plus with locked center position (VM)
• SRU-plus with electrical feed-through (EDF)
• SRU-plus ATEX (EX)
1.2 Warranty
If the product is used as intended, the warranty is valid for 24
months from the ex-works delivery date under the following
conditions:
• Observe the specified maintenance and lubrication intervals
• Observe the ambient conditions and operating conditions
Parts touching the workpiece and wear parts are not included in
the warranty.
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General
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1.3 Scope of delivery
The scope of delivery includes
• Pneumatic swivel unit SRU-plus in the version ordered
• Assembly and Operating Manual
• Accessory pack
1.3.1 Accessories pack
Id-No. Accessory pack SRU-plus
20 25 30 35 40 50 60
Without fluid feed-through
5514981 5518653 5514989 5514993 5514997 5515001
With fluid feed-through
5514982 5518654 5514990 5514994 5514998 5515002
With center position
5516590 5518657 5516594 5516596 5516598 5516600
With locked center position
5514983 5518655 5514991 5514995 5514999 5515003
With fluid feed-through and center position
5516591 5518658 5516595 5516597 5516599 5516601
With fluid feed-through and locked center position
5514984 5518656 5514992 5514996 5515000 5515004

General
1.4 Accessories
A wide range of accessories are available for this product
For information regarding which accessory articles can be used
with the corresponding product variants, see catalog data sheet.
1.4.1 Seal kit
Id-No. Seal kit SRU-plus
20 25 30 35 40 50 60
Basic sealing kit
0371000 0371004 5518598 0371008 0371012 0371016 0371020
With center position
5519788 5519792 5519798 5519800 5519804 5519808 5519812
With locked center position
5519789 5519793 5519799 5519801 5519805 5519809 5519813
With fluid feed-through
0371003 0371007 5518599 0371011 0371015 0371019 0371023
With fluid feed-through and center position
5519790 5519794 5519796 5519802 5519806 5519810 5519814
With fluid feed-through and locked center position
5519791 5519795 5519797 5519803 5519807 5519811 5519815
ID no. Seal kit SRU-plus with EDF
20 25 30 35 40 50 60
Basic sealing kit
5521583 5521583 5521585 5521587 5521589 5521591 5521591
Basic sealing kit + monitoring set
5521584 5521584 5521586 5521588 5521590 5521592 5521592
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Basic safety notes
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2 Basic safety notes
2.1 Intended use
The product may only be used for swiveling permissible
attachment parts or workpieces.
• The product may only be used within the scope of its technical
data, }3 [/19].
• When implementing and operating components in safety-
related parts of the control systems, the basic safety principles
in accordance with DIN EN ISO 13849-2 apply. The proven safety
principles in accordance with DIN EN ISO 13849-2 also apply to
categories 1, 2, 3 and 4.
• The product is intended for installation in a machine/system.
The applicable guidelines must be observed and complied with.
• The product is intended for industrial and industry-oriented use.
• Appropriate use of the product includes compliance with all
instructions in this manual.
2.2 Not intended use
Inappropriate use includes using the product as a cutting tool or
drilling tool, for example.
• Any utilization that exceeds or differs from the appropriate use
is regarded as misuse.
2.3 Constructional changes
Implementation of structural changes
By conversions, changes, and reworking, e.g. additional threads,
holes, or safety devices can impair the functioning or safety of the
product or damage it.
• Structural changes should only be made with the written
approval of SCHUNK.
2.4 Spare parts
Use of unauthorized spare parts
Using unauthorized spare parts can endanger personnel and
damage the product or cause it to malfunction.
• Use only original spare parts or spares authorized by SCHUNK.
2.5 Ambient conditions and operating conditions
Required ambient conditions and operating conditions
Incorrect ambient and operating conditions can make the product
unsafe, leading to the risk of serious injuries, considerable material
damage and/or a significant reduction to the product's life span.

Basic safety notes
• Make sure that the product is used only in the context of its
defined application parameters, }3 [/19].
• Make sure that the product is a sufficient size for the
application.
• Make sure that the environment is free from splash water and
vapors as well as from abrasion or processing dust. Exceptions
are products that are designed especially for contaminated
environments.
2.6 Personnel qualification
Inadequate qualifications of the personnel
If the personnel working with the product is not sufficiently
qualified, the result may be serious injuries and significant
property damage.
• All work may only be performed by qualified personnel.
• Before working with the product, the personnel must have read
and understood the complete assembly and operating manual.
• Observe the national safety regulations and rules and general
safety instructions.
The following personal qualifications are necessary for the various
activities related to the product:
Trained electrician Due to their technical training, knowledge and experience, trained
electricians are able to work on electrical systems, recognize and
avoid possible dangers and know the relevant standards and
regulations.
Qualified personnel Due to its technical training, knowledge and experience, qualified
personnel is able to perform the delegated tasks, recognize and
avoid possible dangers and knows the relevant standards and
regulations.
Instructed person Instructed persons were instructed by the operator about the
delegated tasks and possible dangers due to improper behaviour.
Service personnel of
the manufacturer
Due to its technical training, knowledge and experience, service
personnel of the manufacturer is able to perform the delegated
tasks and to recognize and avoid possible dangers.
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Basic safety notes
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2.7 Personal protective equipment
Use of personal protective equipment
Personal protective equipment serves to protect staff against
danger which may interfere with their health or safety at work.
• When working on and with the product, observe the
occupational health and safety regulations and wear the
required personal protective equipment.
• Observe the valid safety and accident prevention regulations.
• Wear protective gloves to guard against sharp edges and
corners or rough surfaces.
• Wear heat-resistant protective gloves when handling hot
surfaces.
• Wear protective gloves and safety goggles when handling
hazardous substances.
• Wear close-fitting protective clothing and also wear long hair in
a hairnet when dealing with moving components.
2.8 Notes on safe operation
Incorrect handling of the personnel
Incorrect handling and assembly may impair the product's safety
and cause serious injuries and considerable material damage.
• Avoid any manner of working that may interfere with the
function and operational safety of the product.
• Use the product as intended.
• Observe the safety notes and assembly instructions.
• Do not expose the product to any corrosive media. This does
not apply to products that are designed for special
environments.
• Eliminate any malfunction immediately.
• Observe the care and maintenance instructions.
• Observe the current safety, accident prevention and
environmental protection regulations regarding the product's
application field.

Basic safety notes
2.9 Transport
Handling during transport
Incorrect handling during transport may impair the product's
safety and cause serious injuries and considerable material
damage.
• When handling heavy weights, use lifting equipment to lift the
product and transport it by appropriate means.
• Secure the product against falling during transportation and
handling.
• Stand clear of suspended loads.
2.10 Malfunctions
Behavior in case of malfunctions
• Immediately remove the product from operation and report the
malfunction to the responsible departments/persons.
• Order appropriately trained personnel to rectify the
malfunction.
• Do not recommission the product until the malfunction has
been rectified.
• Test the product after a malfunction to establish whether it still
functions properly and no increased risks have arisen.
2.11 Disposal
Handling of disposal
The incorrect handling of disposal may impair the product's safety
and cause serious injuries as well as considerable material and
environmental harm.
• Follow local regulations on dispatching product components for
recycling or proper disposal.
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Basic safety notes
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2.12 Fundamental dangers
General
• Observe safety distances.
• Never deactivate safety devices.
• Before commissioning the product, take appropriate protective
measures to secure the danger zone.
• Disconnect power sources before installation, modification,
maintenance, or calibration. Ensure that no residual energy
remains in the system.
• If the energy supply is connected, do not move any parts by
hand.
• Do not reach into the open mechanism or movement area of
the product during operation.
2.12.1 Protection during handling and assembly
Incorrect handling and assembly
Incorrect handling and assembly may impair the product's safety
and cause serious injuries and considerable material damage.
• Have all work carried out by appropriately qualified personnel.
• For all work, secure the product against accidental operation.
• Observe the relevant accident prevention rules.
• Use suitable assembly and transport equipment and take
precautions to prevent jamming and crushing.
Incorrect lifting of loads
Falling loads may cause serious injuries and even death.
• Stand clear of suspended loads and do not step into their
swiveling range.
• Never move loads without supervision.
• Do not leave suspended loads unattended.

Basic safety notes
2.12.2 Protection during commissioning and operation
Falling or violently ejected components
Falling and violently ejected components can cause serious injuries
and even death.
• Take appropriate protective measures to secure the danger
zone.
• Never step into the danger zone during operation.
2.12.3 Protection against dangerous movements
Unexpected movements
Residual energy in the system may cause serious injuries while
working with the product.
• Switch off the energy supply, ensure that no residual energy
remains and secure against inadvertent reactivation.
• Never rely solely on the response of the monitoring function to
avert danger. Until the installed monitors become effective, it
must be assumed that the drive movement is faulty, with its
action being dependent on the control unit and the current
operating condition of the drive. Perform maintenance work,
modifications, and attachments outside the danger zone
defined by the movement range.
• To avoid accidents and/or material damage, human access to
the movement range of the machine must be restricted. Limit/
prevent accidental access for people in this area due through
technical safety measures. The protective cover and protective
fence must be rigid enough to withstand the maximum possible
movement energy. EMERGENCY STOP switches must be easily
and quickly accessible. Before starting up the machine or
automated system, check that the EMERGENCY STOP system is
working. Prevent operation of the machine if this protective
equipment does not function correctly.
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Basic safety notes
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2.12.4 Protection against electric shock
Possible electrostatic energy
Components or assembly groups may become electrostatically
charged. When the electrostatic charge is touched, the discharge
may trigger a shock reaction leading to injuries.
• The operator must ensure that all components and assembly
groups are included in the local potential equalisation in
accordance with the applicable regulations.
• While paying attention to the actual conditions of the working
environment, the potential equalisation must be implemented
by a specialist electrician according to the applicable
regulations.
• The effectiveness of the potential equalisation must be verified
by executing regular safety measurements.

Basic safety notes
2.13 Notes on particular risks
DANGER
Risk of fatal injury from suspended loads!
Falling loads can cause serious injuries and even death.
•Stand clear of suspended loads and do not step within their
swiveling range.
•Never move loads without supervision.
•Do not leave suspended loads unattended.
•Wear suitable protective equipment.
WARNING
Risk of injury from objects falling and being ejected!
Falling and ejected objects during operation can lead to serious
injury or death.
•Take appropriate protective measures to secure the danger
zone.
WARNING
Risk of injury due to unexpected movements!
If the power supply is switched on or residual energy remains in
the system, components can move unexpectedly and cause
serious injuries.
•Before starting any work on the product: Switch off the power
supply and secure against restarting.
•Make sure, that no residual energy remains in the system.
WARNING
Risk of injury from sharp edges and corners!
Sharp edges and corners can cause cuts.
•Use suitable protective equipment.
WARNING
Risk of burns through contact with hot surfaces!
Surfaces of components can heat up severely during operation.
Skin contact with hot surfaces causes severe burns to the skin.
•For all work in the vicinity of hot surfaces, wear safety gloves.
•Before carrying out any work, make sure that all surfaces have
cooled down to the ambient temperature.
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Basic safety notes
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WARNING
Risk of injury from parts coming loose!
If the shock absorbers are faulty, the product can become
damaged. Parts coming loose in this way can lead to injuries.
•Regularly check the components for wear and damage.
WARNING
Risk of injury if the condition or behavior of the product is
undefined!
Cutting off the compressed air supply in an uncontrolled manner
could lead to undefined states and behavior. This may cause
personal injury or material damage.
•The operator must define suitable emergency stop and
restarting strategies.
✓Emergency stop strategies: e.g. by means of controlled shut
down
✓Restarting strategies: e.g. using pressure build-up valves or
suitable valve switching sequences

Technical data
3 Technical data
3.1 Type key
SRU-plus 20 - W- 180 - 3 - M - 4 - EX-M8 -AS
Size
20 25 30
35 40 50
60
Damping type
S = speed
W = soft
H = hard
Swivel angle
90°
180°
End position adjustability
3°
90°
Center position
– = none
M = pneumatic
VM = locked
Fluid feed-through
– = none
4 = 4 lines for the sizes 20 – 35
8 = 8 lines for the sizes 40 – 63
Explosion-protected variant
– = none
EX
Electrical feed-through
– = none
M5 = M5 plug on rotation side
M8 = M8 plug on rotation side
M12 = M12 plug on rotation side
Attachment kit inductive proximity switch
– = none
AS
Type key
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Technical data
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3.2 Basic data
DANGER
Danger of explosion in potentially explosive areas!
•Observe supplementary sheet for products with explosion-
resistant versions "SRU-plus -...-EX".
Designation Value
Noise emission [dB(A)] ≤ 70
Pressure medium Compressed air, compressed air
quality according to
ISO 8573-1:7 4 4
Min. pressure [bar] See catalog data sheet
Max. pressure [bar] See catalog data sheet
Basic EDF data
Designation Value
Max. voltage [V] 24
Max. current per wire [A] 1
Maximum transmission rate
PROFIBUS
[MBaud] 1.5
The catalog data sheet contains diagrams for designing the
maximum permissible mass moment of inertia.
The SCHUNK contact person provides support for designing further
applications.
More technical data is included in the catalog data sheet.
Whichever is the latest version.